DO or NOT remove EGR on vw passat tdi ?

Mar4ix · 31-10-2013 2:20pm #1

I have found , that egr valve on passat TDI B5 , 2001, has shot, and needs to be replaced, found egr removal kit nearly 3 times cheaper than egr .

would be any complications after egr removal ? found some info in internet, that there is NO effect on engine whatsoever , but love to know people thought of it .

Ta.

jimgoose · 31-10-2013 2:22pm

Bin it. A turbodiesel of that vintage will run better without it.

Mar4ix · 31-10-2013 2:23pm

jimgoose wrote: »

Bin it. A turbodiesel of that vintage will run better without it.

what to do with non-shutter valve ? just use car without it ?

jimgoose · 31-10-2013 2:26pm

Mar4ix wrote: »

what to do with non-shutter valve ? just use car without it ?

Do you mean the anti-shudder valve? Leave that there, it's useful.

Mar4ix · 31-10-2013 2:30pm

jimgoose wrote: »

Do you mean the anti-shudder valve? Leave that there, it's useful.

but it is build in in to egr, and remove kit is just peace of pipe aluminum pipe adapted to screw in to inlet manifold.... actually anti-shudder valve is fecked also ... leaking air air/vacuum through membrane.

jimgoose · 31-10-2013 2:32pm

Mar4ix wrote: »

but it is build in in to egr, and remove kit is just peace of pipe aluminum pipe adapted to screw in to inlet manifold.... actually anti-shudder valve is fecked also ... leaking air air/vacuum through membrane.

Fine. Bin the lot.

Mar4ix · 31-10-2013 2:34pm

jimgoose wrote: »

Fine. Bin the lot.

:pac:

ehhh.. ok.

Chimaera · 31-10-2013 2:42pm

You may need to remap to properly remove it. There's a chance you'll end up with error codes on the ECU, and worst case, limp mode otherwise.

Mar4ix · 31-10-2013 2:46pm

Chimaera wrote: »

You may need to remap to properly remove it. There's a chance you'll end up with error codes on the ECU, and worst case, limp mode otherwise.

yes, i thought about it, egr removal is fairly easy by the electronics, i just need to figure out how to do this. yes, consider do myself, just in entire egr map need to put shut egr values , and thats it.

jimgoose · 31-10-2013 2:46pm

Chimaera wrote: »

You may need to remap to properly remove it. There's a chance you'll end up with error codes on the ECU, and worst case, limp mode otherwise.

Mmm. An '01 B5 TDI won't have any OBD-II, so maybe it'll just keep quiet.

Mar4ix · 31-10-2013 2:49pm

jimgoose wrote: »

Mmm. An '01 B5 TDI won't have any OBD-II, so maybe it'll just keep quiet.

well .. there is obd II , since some mid of 90 ties ,and i am using original vag-com to do diagnostics ... so no problem with that. and 01 one is that one which is facelifted , produced from 01 - 05 , with electronic injectors, no diesel pump , just high pressure pump which is just to make high diesel pressure in system

jimgoose · 31-10-2013 2:51pm

Mar4ix wrote: »

well .. there is obd II , since some mid of 90 ties ,and i am using original vag-com to do diagnostics ... so no problem with that. and 01 one is that one which is facelifted , produced from 01 - 05 , with electronic injectors, no diesel pump , just high pressure pump which is just to make high diesel pressure in system

OBD-II wasn't mandatory for diesels sold in Europe until 2004, but one is occasionally "lucky"!

Mar4ix · 31-10-2013 3:02pm

jimgoose wrote: »

OBD-II wasn't mandatory for diesels sold in Europe until 2004, but one is occasionally "lucky"!

Or i am mistaken and confused ?? what is the difference between obd I and obd II , cant remember now.

well there is regular obd connecter - http://www.google.ie/imgres?imgurl=http://www.askthemechanic.co.uk/images/VW_Diagnostic_Socket_Location.JPG&imgrefurl=http://www.askthemechanic.co.uk/diagnostic-socket-location/volkswagen.html&h=336&w=436&sz=51&tbnid=pMP3in5awHjsaM:&tbnh=92&tbnw=119&zoom=1&usg=__Oj1CoRQPoE1225Hix4rA5elG09c=&docid=C5WG7rb1Z3xd8M&sa=X&ei=s3ByUpqxOfHjsASBmYHoBg&ved=0CDMQ9QEwAw

jimgoose · 31-10-2013 3:03pm

Mar4ix wrote: »

Or i am mistaken and confused ?? what is the difference between obd I and obd II , cant remember now.

well there is regular obd connecter - http://www.google.ie/imgres?imgurl=http://www.askthemechanic.co.uk/images/VW_Diagnostic_Socket_Location.JPG&imgrefurl=http://www.askthemechanic.co.uk/diagnostic-socket-location/volkswagen.html&h=336&w=436&sz=51&tbnid=pMP3in5awHjsaM:&tbnh=92&tbnw=119&zoom=1&usg=__Oj1CoRQPoE1225Hix4rA5elG09c=&docid=C5WG7rb1Z3xd8M&sa=X&ei=s3ByUpqxOfHjsASBmYHoBg&ved=0CDMQ9QEwAw

Yup, looks like one alright. That isn't necessarily to say that the machine "speaks" OBD-II behind it, though.

Mar4ix · 31-10-2013 3:13pm

jimgoose wrote: »

Yup, looks like one alright. That isn't necessarily to say that the machine "speaks" OBD-II behind it, though.

yes , i thought about it. Any idea what software needs to be used to change that map ? or thats ecu off work ?

some stuff here - https://sites.google.com/site/vagecumap/winols-making-map-changes

jimgoose · 31-10-2013 3:19pm

Mar4ix wrote: »

yes , i thought about it. Any idea what software needs to be used to change that map ? or thats ecu off work ?

some stuff here - https://sites.google.com/site/vagecumap/winols-making-map-changes

Some bespoke VAG diag yoke, I expect. But if that isn't a PD engine it's unlikely you'll have any ECU bother.

Mar4ix · 31-10-2013 3:43pm

jimgoose wrote: »

Some bespoke VAG diag yoke, I expect. But if that isn't a PD engine it's unlikely you'll have any ECU bother.

it is indeed PD one . vw engine code AVF .

Actually it is not that old mate. my car is only 12 years old, but that engine been manufactured up till 05 , or more. one of best diesel engines .

by the egr removal, i am expecting cleaner engine room, as there is always oil leak from egr valve. , which goes down to exhast manifold.

Chimaera · 31-10-2013 4:40pm

The remap on EDC-15 ECUs can be done via the diagnostic port but it needs specific software and hardware and a real knowledge of what you're doing. The potential to kill your engine with a bad remap is high.

OBD-I and OBD-II are standardised protocols originating in the US for emissions purposes. There is also a European version called EOBD. They are limited to powertrain components. Manufacturer specific protocols exist to cover the plethora of other controllers modern cars have, and to provide more detailed access to powertrain controllers than the OBD protocols cover.

Regardless of whether or not the ECU implements any or all of these protocols, it's still going to have error checking built into it for stuff like EGR and will still throw codes, which may or may not put on the check engine light. If that comes on, you're not going to pass an NCT. The ECU usually checks for EGR presence by monitoring airflow: for a given combination of MAF and EGR duty cycle, it'll expect a certain lambda reading (and possibly MAP too). If it doesn't get that figure, it'll throw a fault code because the system is no longer functioning correctly. It also compares requested MAF to actual MAF and if there's a discrepancy due to the absence of EGR, again it'll complain. This stuff is why you need the remap: to change the figures used for these comparisons.

Mar4ix · 31-10-2013 5:08pm

Chimaera wrote: »

The remap on EDC-15 ECUs can be done via the diagnostic port but it needs specific software and hardware and a real knowledge of what you're doing. The potential to kill your engine with a bad remap is high.

OBD-I and OBD-II are standardised protocols originating in the US for emissions purposes. There is also a European version called EOBD. They are limited to powertrain components. Manufacturer specific protocols exist to cover the plethora of other controllers modern cars have, and to provide more detailed access to powertrain controllers than the OBD protocols cover.

Regardless of whether or not the ECU implements any or all of these protocols, it's still going to have error checking built into it for stuff like EGR and will still throw codes, which may or may not put on the check engine light. If that comes on, you're not going to pass an NCT. The ECU usually checks for EGR presence by monitoring airflow: for a given combination of MAF and EGR duty cycle, it'll expect a certain lambda reading (and possibly MAP too). If it doesn't get that figure, it'll throw a fault code because the system is no longer functioning correctly. It also compares requested MAF to actual MAF and if there's a discrepancy due to the absence of EGR, again it'll complain. This stuff is why you need the remap: to change the figures used for these comparisons.

Nice one , thanks. Any idea how much would cost remap ? I think there is already somebody played with ecu , as it fly like a rocket, would need to find out , is it already re-mapped, and if it is, then how good is done , and remove egr from ecu. thanks

dgt · 31-10-2013 7:32pm

Bin the EGR. I found with the XUD it had a nasty habit of sooting up, causing it to clog and stay open, resulting in power loss.

Having ran the past 6k miles with a very crude blank, no problems to report. I don't need a remap though, you will

Have you considered an EGR race pipe?

DO or NOT remove EGR on vw passat tdi ?

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